/**
 * @(#)ApplicationController.java 2011
 *
 *  Copyright 2011 classic-commerce
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 * This class represents the cart summary widget that displays, at a glance, the
 * basic details of the content of the current cart. It allows the user to see
 * the quantity of items current in the cart and the sub total (without
 * applying the applicable taxes) amount cost of the items.
 *
 * @author: <a href="mailto:richard@ioniq.ca">Richard Mutezintare</a>
 *
 */
package ca.ioniq.client;

import ca.ioniq.client.event.LoginEvent;
import ca.ioniq.client.event.LoginEventHandler;
import ca.ioniq.client.presenter.HeaderViewPresenter;
import ca.ioniq.client.presenter.MainContentPresenter;
import ca.ioniq.client.presenter.Presenter;

import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.ui.HasWidgets;


public class ApplicationController implements Presenter, ValueChangeHandler<String> {

    private EventBus eventBus;

    private HeaderViewPresenter headerViewPresenter;
    private MainContentPresenter mainContentPresenter;

    public ApplicationController(final EventBus eventBus) {
        this.eventBus = eventBus;

        registerEvents();
    }

    private void registerEvents() {
        History.addValueChangeHandler(this);

        eventBus.addHandler(LoginEvent.TYPE, new LoginEventHandler() {

            public void onLogin(LoginEvent event) {
                doLogin();
            }
        });

//        eventBus.addHandler();
    }

    private void doLogin() {
        History.newItem("login", false);

        // load the next screen in the sequence
    }

    /**
     * History management is handled her. This construct is not limited
     * to history management strictly.
     */
    public void onValueChange(ValueChangeEvent<String> event) {
        String token = event.getValue();

        if (token != null) {

        }
    }

    /**
     * select the next container
     */
    public void go(final HasWidgets container) {

    }

}
